Use cases / Plumbing / Seasonal reactivation
Drain and sewer maintenance reactivation (email first)
Past drain-cleaning customers may need service again, and many won't remember who they used last time.
The business case
Incremental-lift model: baseline lost volume × lift × job value × gross margin − running cost. Every input below is an illustrative assumption, not an industry statistic. Measure the client's real baseline first.
- Baseline: 40 past drain customers contacted per week
- Average job value $325, gross margin 50%, running cost $50/mo, setup $1,000
| Case | Lift (extra booked jobs ÷ baseline) | Extra gross profit / mo | Payback |
|---|---|---|---|
| Conservative | 0.5% | $91 | 11.0 months |
| Expected | 1.0% | $231 | 4.3 months |
| Optimistic | 1.5% | $372 | 2.7 months |
Requirements & gating
- Jobber: public GraphQL API using OAuth. A custom integration can connect to up to 5 Jobber accounts without App Review; beyond that it must pass Marketplace review. verified
- Housecall Pro: the public API and webhooks are MAX plan only, and the owner generates the API key. Webhook events include
estimate.sent,job.completed,lead.created,invoice.paid. verified - ServiceTitan: API access is partner-gated (Request Access, then a verification that takes roughly 3–5 business days). ServiceTitan tells customers not to give third-party developers admin access or API keys, and to contact ServiceTitan Integrations first. Plan for this before you quote. verified
- Zapier, Make, and n8n connectors for the job-management app: not verified. Confirm the exact trigger exists before you rely on it.
Check what the app already does first:
- Jobber includes automated quote follow-ups, visit reminders, on-my-way texts, invoice follow-ups, and Google review requests with up to two reminders verified.
- Housecall Pro includes scheduled, on-my-way, finished, appointment-reminder, and invoice-reminder notifications verified. Review features: not verified.
Build steps
- Export customers with a drain or sewer job 9–18 months ago (from Jobber, Housecall Pro, or a ServiceTitan report export).
- Use email by default. Use SMS only for customers with documented consent to marketing texts.
- Personalize with the LLM: last service date, tech name, and service type. Send through the client's email tool with an unsubscribe link and physical address (CAN-SPAM).
- Track bookings with a unique booking link or promo code so the lift can be measured.
Test cases before go-live
- A customer with an open job is excluded.
- An unsubscribed address is excluded.
- A bounced email is suppressed on the next run.
Tool names are examples, not endorsements. Check current features, plan tiers, and pricing before quoting a client.
Sample prompt
Draft a short reminder email for {customer}, whose main line was cleaned on {date}. Offer a maintenance check, mention our tech {tech} by name, and include an unsubscribe line.Pitch it to the owner
"Past customers already know you, and a reminder brings some of them back."
Lead with the outcome, not with "AI," and show the business case using their own numbers.
What can go wrong
- Messaging old lists can trigger complaints. Email first, and send SMS only with documented consent.
- Texting consent: Under the TCPA, automated texts generally need prior express consent, and marketing texts need prior express written consent. Honor STOP right away and keep consent records.
- Twilio/10DLC (2026): new A2P 10DLC campaigns must include public privacy policy and terms URLs (required since June 30, 2026), a verifiable opt-in, and opt-out language. Third-party lead generation and affiliate marketing are forbidden use cases. verified
- Reactivation defaults to email. Texting past customers is marketing. Use SMS only where written consent is documented.
- Call-recording consent: some states, including California, require all parties to consent (this list is not exhaustive). The safe default is to disclose recording and the automated assistant at the start of every call.
- AI voices: the FCC's February 2024 declaratory ruling (FCC-24-17) treats AI-generated voices as 'artificial voice' under the TCPA, so outbound AI calls generally need prior express consent. Further AI disclosure rules were only proposed in 2024. Keep builds inbound unless counsel approves. verified
- Failure modes: hallucinated details, missed escalations, and integrations that break silently. Add a human fallback, daily error alerts, and a weekly transcript review.
Not legal advice. Texting, calling, and recording rules vary by country and state and change over time. Have the client confirm compliance with qualified counsel before launch.
Suggested price
$750–$1,800 per campaign setup
Starting estimate only, not verified against market rates. Adjust for scope and support.